B/E Aerospace
http://www.beaerospace.com/home.nsf/CareerCollegeFrameset?OpenFrameset

BNSF Railway (all fields might not be available in Washington)
http://www.bnsf.com/careers/college/internships.html

British Petroleum (all fields might not be available in Washington)
http://www.bp.com/sectionbodycopy.do?categoryId=122&contentId=7058789

Bryant Christie
http://www.bryantchristie.com/content/careers

Cargill
http://www.cargill.com/careers/opportunities/cargill_internships.htm

CH Robinson Worldwide
http://www.chrobinson.com/careers/student-internships.asp

CI Intern
http://www.ciintern.com/forinterns.html

Defense Logistics Agency
http://www.hr.dla.mil/prospective/careers/

Exotic Metals Forming Company
http://www.emfcowa.com/jobs/jobs.htm

Ferguson
http://www.libertyeq.com/Recruiting/internships.shtml

Genzyme
http://www.genzyme.com/corp/careers/intern_positions.asp

Honeywell Corp.
http://www.honeywell.com/careers/undergrad_fit.html

Itron
http://www.itron.com/pages/careers_internships.asp

Jeld-Wen
http://www.jwcareers.com/

Kimberly Clark
http://www.kimberly-clark.com/careers/na/coop_interns.aspx

Konica Minolta (all fields might not be available in Washington)
http://kmbs.konicaminolta.us/content/about/careers/jobsearch/careersearch.html

Lowe's (all fields might not be available in Washington)
http://careers.lowes.com/college_recruiting_summer.aspx

NFL Jobs (Internships) (Seahawks)
http://footballjobs.teamworkonline.com/teamwork/jobs/jobs.cfm?supcat=321&supcat_name=Internships

Sears
http://www.searsholdings.com/careers/college/undergrad_int.htm

Southwest Airlines (all fields might not be available in Washington)
https://www.swajobs.com/ci20/index.jsp?seq=postingSearch&applicationName=swaExtCI&locale=en_US

Starbucks
http://www.starbucks.com/aboutus/internships.asp

Target

TJX (TJ Maxx, Marshalls)
http://www.tjx.com/careers_college_internships.asp

Todd Pacific Shipyards
http://www.toddpacific.com/company/jobs/internship.php

Turner Construction
https://turner.ats.hrsmart.com/cgi-bin/a/searchjobs_quick.cgi

United Airlines
http://www.united.com/page/article/0,6722,51565,00.html

URS (not all fields might be available in Washington)
http://www.urscorp.com/Careers/internships.php